ResearchResearch paperRobotics & Embodied AI · Image, Video & 3D Generation · Efficiency & Inference1 source · Oct 12, 2026

PhysCodeGym: Benchmarking Coding Agents for Physically Verifiable 4D Reconstruction

We introduce PhysCodeGym, a benchmark for physically verifiable 4D reconstruction with $156$ tasks covering rigid-body, liquid, deformable, and wind-driven motion.

Key points

  • Building physical simulations from video requires coding agents to translate observations into executable models and refine them through tool use.
  • Six metrics combine rule-based measurements with rubric-based judgments to assess visual and physical reconstruction quality.
  • Program inspection, scene measurements, and counterfactual interventions test physical consistency under original and modified conditions.
  • Experiments with frontier coding agents reveal a tradeoff between artifact quality and completion across reasoning-effort settings, while harness comparisons and agent traces link verification behavior with reconstruction performance.

Sources (1)

  • [1]PhysCodeGym: Benchmarking Coding Agents for Physically Verifiable 4D Reconstruction
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 12, 06:44 PM
    We introduce PhysCodeGym, a benchmark for physically verifiable 4D reconstruction with $156$ tasks covering rigid-body, liquid, deformable, and wind-driven motion.
    Building physical simulations from video requires coding agents to translate observations into executable models and refine them through tool use.

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